Coastal Bend Texas Benthic Habitat Mapping Aransas Bay

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)

Publication_Date: 20070823

Title: Coastal Bend Texas Benthic Habitat Mapping Aransas Bay

Geospatial_Data_Presentation_Form: Digital vector data

Publication_Information:

Publication_Place: Charleston, SC

Publisher: NOAA's Ocean Service, Coastal Services Center (CSC)

Online_Linkage:

http://csc.noaa.gov/benthic/data/gulf/bend.htm

Description:

Abstract:

In 2006 and 2007 the NOAA Coastal Services Centerpurchased services to process existing digital multi-spectralimagery (ADS-40) and create digital benthic habitat datafrom this imagery for selected Texas coastal bend bays.The Center worked cooperatively with the Texas Parksand Wildlife Department (TPWD) and the Texas A&MUniversity Center for Coastal Studies to develop benthichabitat data, primarily Submerged Aquatic Vegetation(SAV) for several coastal bays. This data will support thestate's recently adopted Seagrass Monitoring Programwhich calls for regional mapping of SAV for status andtrends assessment. The Center, Texas A&M, and TPWDhave coordinated on the requirements of this project.

Purpose:

These data have been created as a result of the need forhaving geospatial data immediately available and easilyaccessible in order to enhance the capability of the NOAACoastal Services Center (CSC)

Supplemental_Information:

Benthic habitat vector data was generated over eightTexas Coast study areas. The geographic extent of theseCorpus Christi Bay - ~356 mi2 , Redfish Bay - ~62 mi2,Aransas Bay - ~285 mi2, and Copano Bay - ~158 mi2,Lower Laguna Madre - ~800 mi2, Upper Laguna Madre -~313 mi2, Baffin Bay - ~232 mi2, San Antonio Bay - ~ 370mi2. Benthic habitat data was generated for all estuarinelands below mean high water within the study area. Nobenthic data was required for the marine side of the barrierbeaches.

Time_Period_of_Content:

Time_Period_Information:

Single_Date_Time:

Calendar_Date: 20070823

Currentness_Reference: Publication Date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -097.074216

East_Bounding_Coordinate: -096.709414

North_Bounding_Coordinate: 28.295159

South_Bounding_Coordinate: 27.827573

Keywords:

Theme:

Theme_Keyword_Thesaurus: NOS Data Explorer Topic Category

Theme_Keyword: Environmental Monitoring

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: environment

Theme_Keyword: 007

Theme_Keyword: oceans

Theme_Keyword: 014

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: 010

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Digital map

Theme_Keyword: Benthic habitat

Theme_Keyword: Submerged aquatic vegetation

Theme_Keyword: Seagrass

Theme_Keyword: Texas Seagrass Monitoring Program

Theme_Keyword: Habitat classification

Place:

Place_Keyword_Thesaurus: Geographic Names Information System

Place_Keyword: Texas

Place_Keyword: TX

Place_Keyword: US

Access_Constraints: None

Use_Constraints: None

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Fugro EarthData, Inc.

Contact_Person: Harold Rempel

Contact_Position: Director of Program Management

Contact_Address:

Address_Type: mailing and physical address

Address: 7320 Executive Way

City: Frederick

State_or_Province: MD

Postal_Code: 21704

Country: USA

Contact_Voice_Telephone: 301-948-8550

Contact_Facsimile_Telephone: 301-963-2064

Contact_Electronic_Mail_Address: hrempel@earthdata.com

Hours_of_Service: 9:00am - 5:00pm

Data_Set_Credit: NOAA Coastal Services Center

Native_Data_Set_Environment:

Windows NT/2000 Systems, Definiens Professional,statistical software for the CART analysis, ArcGIS, ErdasImagine

progaff:

progname: National Biological Information Infrastructure

progname: National Ocean Service Data Explorer

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Horizontal accuracy of the reprocessed source imagerywas verified to be better than 5 meters at 90% confidencelevel in accordance with National Map AccuracyStandards for a 1-meter GSD. The thematic accuracy ofthe habitat maps meet or exceed the minimum acceptablefield/map accuracy limits which are 80% for each individualhabitat type, and 85% overall for baseline benthic habitatat the SCHEME 2-digit subclass level from a "users," aswell as a "producers" perspective as defined by Story andCongalton, 1986.

Logical_Consistency_Report:

For the reprocessed imagery, compliance with theaccuracy standard was ensured by the placement of photoidentifiable ground control points. A total of 18 photoidentifiable ground survey points was used for thecalculations. An RMS value was calculated based on theimagery reprocessed for this project by comparing theaerotriangulated X and Y coordinates. This valuerepresents an estimate of the accuracy of the horizontalcoordinate measurements in the tile expressed in meters.For the final map product Initial Map accuracy assessmentwas used as a tool to prioritize areas for further fieldexamination and after field investigation to prioritize thoseareas where additional modeling or interpretation wasneeded. Error matrices showing both deterministic andfuzzy accuracies werec ompiled for the initial map. Basedon the results compiled from the assessment, the team visitany classes exhibiting inaccuracy and addressed theclasses through modeling, additional analysis or manualediting.

Completeness_Report:

Compliance with the accuracy standard for thereprocessed imagery was ensured by the placement ofphoto identifiable ground control points and the collectionof airborne GPS data. Compliance with the accuracystandard for the final map product was ensured by fieldchecks and manual editing.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Accuracy assessment determined by evaluating thehorizontal accuracy obtained during the aerotriangulationprocess for each lift for the reprocessed imagery and byfield verification for the completed map product.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: None

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Terrasurv Inc.

Publication_Date: 20051109

Title: REPORT OF GPS SURVEY TEXAS COASTAL AREA MAPPING

Geospatial_Data_Presentation_Form: model

Source_Scale_Denominator: 1000

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates_Times:

Beginning_Date: 20051017

Ending_Date: 20051019

Source_Currentness_Reference: Ground Condition

Source_Citation_Abbreviation: GPS Ground Control

Source_Contribution:

TerraSurv, Inc. of Pittsburgh, PA was contracted byEarthData International of Frederick, MD to perform ageodetic control survey in support of mapping an areaalong the southeasterly coast of Texas between PortLavaca and Brownsville. Thirty-eight photo identifiablelocations were surveyed to provide ground control andquality assurance checks for the mapping. Twenty of thestations were used for mapping control and eighteen of thestations were used for quality checks. The horizontaldatum was the North American Datum of 1983, CORSadjustment (NAD 1983 CORS). The vertical datum was theNorth American Vertical Datum of 1988 (NAVD 1988).

Source_Information:

Source_Citation:

Citation_Information:

Originator: Northwest Geomatics

Publication_Date: 20041111

Title: 2004 ADS40 Digital NAIP Imagery

Geospatial_Data_Presentation_Form: remote-sensing image

Source_Scale_Denominator: 900

Type_of_Source_Media: digital

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates_Times:

Beginning_Date: 20041103

Ending_Date: 20041107

Source_Currentness_Reference: Ground Condition

Source_Citation_Abbreviation: Imagery

Source_Contribution:

The digital orthophotography was developed from imageryacquired as part of the 2004 overflight of the State ofTexas developed for the USDA National AgriculturalImagery Program (NAIP). In order to achieve a horizontalaccuracy of 5 meters, CE90 it is necessary to reprocessthe imagery incorporating new GPS field control. It shouldbe noted that the imagery was not tide coordinated so tidalvariation may exist between sorties. The imagery wasacquired between November 3, 2004 and November 7,2004.

Process_Step:

Process_Description:

The original 1m DOQQs for the project area wereresampled to 2m and mosaicked. For habitat classification,the mosaicked imagery was divided into six processing oneset of six mosaics for true color and one set of six mosaicsfor color-IR. Image segmentation was performed using onthe blue, green, red, and near-infrared bands for each ofthe six processing areas. The classification of the habitatsegments (as ESRI polygon shapefiles) was performedusing CART analysis. The habitat maps for each of the sixareas was refined with the aid of field data collected duringMay, June, and July 2006 and January 2007. The sixprocessing area shapefiles were edgematched andcombined into a single shapefile which was clipped to thefinal project area boundary and then clipped into sixseparate shapefiles representing the six bay systems in theproject area. Adjacent bay systems do not overlap,resulting in no overlapping habitat polygons across theentire project area. Each polygon, within and across all sixbay systems, has a unique polygon identification number.Each shapefile was checked for proper topology and toinsure that each polygon has a correct habitat label,habitat code, modifier label if present, unique identificationnumber, and an area calculation. Polygons below the100m2 minimum mapping unit (MMU) were eliminated,though some polygons <100m2 were retained if their areachanged to below the MMU due to the polygon boundarysmoothing process. The habitat data also went through aindependent validation review. Accuracy assessment wasperformed on seven classes with Patchy SRV andContinuous SRV being combined into a single accuracyclass. For field data collection, non-random sites in theform of polygons were chosen by analysts with an attemptto sample all available image signatures. These sites werevisited in the field and data on each site was collecteddirectly into digital format (ESRI shapefile) using a laptop oronto a paper form that was later entered into digital format.Sites were navigated to primarily using a Garmin GPS 76unit connected to a Panasonic Toughbook laptopdisplaying the project imagery and polygons in ArcMapv9.1 or using the GPS unit alone. Habitat classificationwas estimated as accurately as possible using differentmethods or combination of methods which included abovewater observation, snorkeling, wading, and underwatervideo. This data was entered into an ESRI shapefile via adigital field form in ArcMap specifically developed for thistype of field data collection. After collection, sites wereclassified as either "sand" or "mud" bottom type usingTexas Bureau of Economic Geology sediment maps. Moresample polygon sites were collected in-office based on thein-field collected sites in order to meet the 50 sites perclass per bottom type accuracy assessment requirement.Once all the sites were chosen, they were again dividedinto "sand"and "mud" bottom types. For each class, perbottom type, a random selector macro in ArcMap was usedto randomly select 50 sites for accuracy assessment. Theentire pool of accuracy sites was kept separate from theremaining sites and only used for accuracy assessmentduring the project. Anonymity of the accuracy sites wasmaintained throughout the project because it wasunnecessary to ever visually review these sites in order toperform the accuracy analysis. More accuracyassessment sites were collected in a later field collectiontrip to add to the analysis. These sites were chosen byrandomly selecting polygons within specific regions thatwere pre-determined to be visited. Information for thesesites was collected using the same methods for the othersites. Accuracy information was compiled using ArcMap.Accuracy polygons were transformed into polygon centroidpoints forced to be located within the polygon. Thesepoints were used to select the corresponding polygons inthe habitat map. The selected polygons' attributes werejoined to the accuracy polygons so that each accuracypolygon had both the accuracy habitat label and its maplabel. An accuracy assessment error matrix was generatedusing this information by importing it to Microsoft Excel andbuilding the matrix. Both deterministic and fuzzy accuracyassessment were performed. The accuracy analysis anderror matrices are presented and discussed in the projectfinal report entitled Coastal Bend of Texas Benthic HabitatMapping Phase 1 Final Report.

Source_Used_Citation_Abbreviation: Imagery

Source_Used_Citation_Abbreviation: GPS Ground Control

Process_Date: 20070809

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Fugro EarthData, Inc.

Contact_Person: Harold Rempel

Contact_Position: Director of Program Management

Contact_Address:

Address_Type: mailing and physical address

Address: 7320 Executive Way

City: Frederick

State_or_Province: MD

Postal_Code: 21704

Country: USA

Contact_Voice_Telephone: 301-948-8550

Contact_Facsimile_Telephone: 301-963-2064

Contact_Electronic_Mail_Address: hrempel@earthdata.com

Hours_of_Service: 9:00am - 5:00pm

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 14

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -099.000000

Latitude_of_Projection_Origin: 00.000000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000128

Ordinate_Resolution: 0.000128

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi_major_Axis: 6378137.000000000000000000

Denominator_of_Flattening_Ratio: 298.257222096042310000

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview: None

Entity_and_Attribute_Detail_Citation: Not applicable

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Coastal Services Center

Contact_Person: Clearinghouse Manager

Contact_Position: Clearinghouse Manager

Contact_Address:

Address_Type: mailing and physical address

Address: 2234 South Hobson Avenue

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Country: USA

Contact_Voice_Telephone: 843-740-1210

Contact_Facsimile_Telephone: 843-740-1224

Contact_Electronic_Mail_Address: clearinghouse@csc.noaa.gov

Hours_of_Service: Monday-Friday, 8-5 EST

Resource_Description: Downloadable Data

Distribution_Liability:

Users must assume responsibility to determine the usabilityof these data.

Metadata_Reference_Information:

Metadata_Date: 20070823

Metadata_Review_Date: 20070823

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Coastal Services Center

Contact_Person: Metadata Specialist

Contact_Position: Metadata Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: 2234 S Hobson Ave.

City: Charleston

State_or_Province: SC

Postal_Code: 29405

Country: USA

Contact_Voice_Telephone: 843-740-1210

Contact_Facsimile_Telephone: 843-740-1224

Contact_Electronic_Mail_Address: csc@csc.noaa.gov

Hours_of_Service: 8:00 am to 5:00 pm EST

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998